WB? I think they care as much as they care about literally anything; someone tell us what will make us money, and then do that thing. If they believe there's money in collector product, they'll invest in making collector product. Doesn't mean they'll do a good job at it - but that's largely subjective anyway. Hell, there's still a huge divide in the fanbase on whether or not McFarlane is doing/did a good job.
One thing I have heard from a source I trust is that several important people at Mattel are, exact words, "actively aware" of the desire among collectors for what they're calling a Marvel Legends-adjacent DC toyline. There's a lot of politics at work there, and people that don't want Mattel's stuff to be seen as second-fiddle, or ancillary product, or whatever. And you'll never catch them talking about ML publicly. But they are aware that ML kind of won the 'superhero action figure longevity' battle and they seem to know they need to mirror that somehow and make something compatible to bring in fans of that style of figure.
Not a guarantee it will happen. But a huge change in attitude from McFarlane's "I don't care, I do 7" stuff" thought process. At least if what I'm hearing is true.